Pressure grouting is a type of injection grouting which fills a void (small or large) with a pumpable material which will then provide strength, durability and waterproofing qualities to the finished product. Find out more about grout pumps here>
The Benefits of Pressure Grouting
Pressure grouting is a great way of stabilising groundworks, underpinning foundations, filling voids and strengthening walls, bridges and historical structures (find out more about pressure grouting itself here >). It has many advantages which we’ll explore below.
This method of grouting (in most cases) causes minimal disruption to the landscape, surrounding soils and nearby structures
Compared to the alternatives of concrete piling or removal and replacement of concrete, pressure grouting is a much cheaper alternative
Pressure grouting can be carried out in places where access is difficult or space is limited
This process can be used on most materials and even with more delicate installations
Compared with piled solutions, which has a smaller support area, pressure grouting expands to maximise the area of support and ground stabilisation
It does not interrupt facility operations
Pressure grouting won’t cause vibrations and therefore minimises structural damage
It can be applied next to existing foundations or adjacent to existing walls
It is easy to apply and fast setting
It is a well-suited solution for repairing foundations of old constructions however you should take care not to over-pressurise as this can cause severe damage. We would advise to fit a pressure gauge to your machine or opt for a more carefully controlled hand-pump
Pressure grouting provides excellent strength and support to stabilise groundworks and foundations as well as strengthening weakened structures such as old bridges, walls or tunnels
The Downsides of Pressure Grouting
It is not so well-suited for coarse-grained or softer soils which have shorter self-support times and an increased risk of soil movement
With small repair jobs it is a less cost-effective solution however on large projects this is the best and cheaper option
Under pressure, the grout will always find the easiest route through the ground or structure. If there are cracks present this could mean the grout entering areas that it is not wanted or even working its way to the surface where it could cause stains and challenging cleaning operations.
Pressure grouting can very easily seep into areas that it is not wanted if there are unknown cracks. This can be particularly problematic if it enters drains or water systems for example
It is very important to control the grout being injected as it is entering the ground at a high-pressure and can cause damage if too much material is injected and cause structural damage instead of the intended stabilisation.